Meet my new leopard flats. I bought them about a month ago and they had these sad little bows that looked like faded shoelaces, so I decided to swap them out for some shiny satin ribbons.
Attach the bows with a generous dab of craft glue, and then trim the ribbon to the desired length. I like mine on the long side, extending over the edge of the shoe.
Edit: After wearing my shoes three times one of the bows fell off! The craft glue wasn't strong enough, so use hot glue or even super glue instead.